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TransCon IL-2 β/γ

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |Ascendis Pharma A/S|Last Updated: Feb 24, 2026

Success Probability

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment320

FDA Designations

No designations recorded

Clinical trial landscape

TransCon IL-2 β/γ · 1 trial · 13 indications

Phase 1 1
NCT05081609A Study to Investigate Safety and Tolerability of TransCon IL-2 β/γ Alone or in Combination With Pembrolizumab and/or TransCon TLR7/8 Agonist or Other Anticancer Therapies in Adult Participants With Locally Advanced or Metastatic Solid Tumor MalignanciesAdvanced Solid Tumor
ACTIVE NOT_RECRUITING320 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study to Investigate Safety and Tolerability of TransCon IL-2 β/γ Alone or in Combination With Pembrolizumab and/or TransCon TLR7/8 Agonist or Other Anticancer Therapies in Adult Participants With Locally Advanced or Metastatic Solid Tumor Malignancies
Advanced Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety and Tolerability
Through study completion, expected average of 2 years

Treatment emergent and treatment related adverse events (assessed by NCI CTCAE v5.0), serious adverse events (SAEs), adverse events leading to treatment discontinuation, deaths.

Maximum Tolerated Dose (MTD)
Each cycle is 21 days

Determine the maximum tolerated dose by assessing the Incidence of Dose Limiting Toxicities (DLTs), treatment emergent and treatment related adverse events (assessed by NCI CTCAE v5.0), serious adverse events (SAEs), adverse events leading to treatment discontinuation and deaths.

Recommended Phase 2 Dose (RP2D)
12 months

To determine a recommended phase 2 dose of TransCon IL-2 β/γ and combination regimen for further development by evaluating number of patients with treatment-related adverse events as assessed by CTCAE.

Secondary Endpoints

Overall Response Rate
Average of 2 years
Pathologic Complete Response
15 weeks
Major Pathologic Response
15 weeks
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1 Monotherapy Dose Escalation: TransCon IL-2 β/γEXPERIMENTALTransCon IL-2 β/γ in escalating doses to evaluate safety/tolerability and to determine the MTD and RP2D
Part 2 Combination Dose Escalation: TransCon IL-2 β/γ with PembrolizumabEXPERIMENTALTransCon IL-2 β/γ with Pembrolizumab in escalating doses to evaluate safety/tolerability and determine the MTD and RP2D
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ with SOC ChemoEXPERIMENTALTransCon IL-2 β/γ using the RP2D with SOC Chemotherapy to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ with TransCon TLR7/8 AgonistEXPERIMENTALTransCon IL-2 β/γ with TransCon TLR7/8 Agonist using the RP2D to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Monotherapy Dose Expansion: TransCon IL-2 β/γ followed by surgeryEXPERIMENTAL(Optional Arm): TransCon IL-2 β/γ using the RP2D followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ with Pembrolizumab followed by surgeryEXPERIMENTALTransCon IL-2 β/γ using the RP2D with Pembrolizumab followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion:TransCon IL-2 β/γ with TransCon TLR7/8 Agonist followed by surgeryEXPERIMENTALTransCon IL-2 β/γ with TransCon TLR7/8 Agonist using the RP2D followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion:TransCon IL-2 β/γ + Pembrolizumab + SOC Chemo followed by surgeryEXPERIMENTALTransCon IL-2 β/γ using the RP2D with Pembrolizumab and SOC Chemotherapy followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose ExpansionEXPERIMENTALTransCon IL-2 β/γ + Pembrolizumab TransCon IL-2 β/γ using the RP2D with Pembrolizumab
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ monotherapyEXPERIMENTALTransCon IL-2 β/γ monotherapy
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ + trastuzumabEXPERIMENTALTransCon IL-2 β/γ + trastuzumab
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ + trastuzumab emtansine (T-DM1)EXPERIMENTALTransCon IL-2 β/γ + trastuzumab emtansine (T-DM1)
Part 4 Combination Dose OptimizationEXPERIMENTALTransCon IL-2 β/γ + Pembrolizumab TransCon IL-2 β/γ using the RP2D in titrating doses and/or different dose frequencies with Pembrolizumab

Interventions

NameTypeDescription
TransCon IL-2 β/γDRUGTransCon IL-2 β/γ will be administered as an intravenous (IV) infusion
PembrolizumabDRUGPembrolizumab will be administered as an intravenous (IV) infusion
Chemotherapy drugDRUGSOC chemotherapy will be administered as an intravenous (IV) infusion
TransCon TLR7/8 AgonistDRUGTransCon TLR7/8 Agonist will be administered as an IT (Intratumoral) injection
SurgeryPROCEDURESurgery will take place 4-6 weeks after last dose of study treatment.
TrastuzumabDRUGTrastuzumab will be administered as an intravenous (IV) infusion
Trastuzumab emtansine (T-DM1)DRUGTrastuzumab emtansine (T-DM1) will be administered as an intravenous (IV) infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites68

Key Inclusion Criteria: * At least 18 years of age, or country defined local legal age * Demonstrated adequate organ function at screening * Life expectancy \>12 weeks as determined by the Investigator * Female and male participants of childbearing potential who are sexually active must agree to us...

Countries:United StatesAustraliaBelgiumCanadaItalyPolandSingaporeSouth KoreaSpainTaiwan
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Advanced Solid Tumor")

Frequently asked questions about TransCon IL-2 β/γ

What is TransCon IL-2 β/γ used for?

TransCon IL-2 β/γ is an investigational oncology therapy being studied for the treatment of advanced solid tumors, including locally advanced and metastatic solid tumor malignancies. The drug is also being evaluated in specific cancer types such as platinum-resistant ovarian cancer, post anti-PD-1 melanoma, cervical cancer, and non-small cell lung cancer.

What does TransCon IL-2 β/γ target?

TransCon IL-2 β/γ targets the IL-2 receptor beta and gamma subunits. By engaging these receptor components, the drug is designed to modulate immune cell activity, which is relevant to its development as a cancer immunotherapy for advanced solid tumors.

Who makes TransCon IL-2 β/γ?

TransCon IL-2 β/γ is being developed by Ascendis Pharma A/S, a biopharmaceutical company traded on the Nasdaq under the ticker symbol ASND. The company is conducting clinical research on this drug for the treatment of advanced solid tumors.

What phase is TransCon IL-2 β/γ in?

TransCon IL-2 β/γ is currently in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities and is still being evaluated for safety and tolerability in clinical trials.

What clinical trials is TransCon IL-2 β/γ in?

TransCon IL-2 β/γ is being studied in clinical trial NCT05081609, a Phase 1 study investigating the safety and tolerability of the drug alone or in combination with pembrolizumab and/or TransCon TLR7/8 agonist or other anticancer therapies. The trial is active but not recruiting participants.